This type of cooling tower is using principle of counter flow current between air stream and water. Water is distributed by sprinkler head and sprinkler pipe which is forced to rotate by supplied water pressure. Hot water moves down through pvc filler making thin water film in order to enhance surface area of heat transfer. The cooling air is sucked from outside using axial fan installed on top of cooling tower. This makes water temperature come down. However air pressure loss will be higher due to counter flow current between air stream and water but heat transfer efficiency will be higher than other types of cooling tower.
Material of Construction
| PART | Material |
| STRUCTURE | Made of hot dip galvanized steel. All parts are connected with galvanized bolts & nuts Tower walls are made of glass fiber reinforced plastic. |
| AIR INLET MESH | Made of PE plastic to prevent foreign material sucked into tower. |
| FAN DUCT | Made of glass fiber reinforced plastic (FRP) installed on top of the tower. Shape is cone to facilitate aerodynamic efficiency and reduce pressure loss. |
| MOTOR | Motor is to drive tower fan. Due to humid air stream, the motor has to be water and moisture proof type IP 55 rated motor is normally used for our standard tower model. Unless higher rating is required. |
| GEAR REDUCER | Big cooling tower always requires high airflow. Hence big fan blade and diameter are necessary. Fan has to be run at lower speed in order to reduce tip speed and noise. Speed reducer is needed. Gear reducer or V-belt pulley drive are generally two options available. Gear reducer will be longer life and less maintenance. However it will be more noisy than V-belt drive. |
| FAN | Made of aluminium alloy. Fan is to create airflow so that water will contact stream air at large. Axial flow fan is suitable since it can make high airflow. Good fan has to be high efficiency, less vibration, corrosion resistnace and safely operated. |
| MOTOR SUPPORT | Made of hot dip galvanized steel. It's to support motor and gear reducer to operate securely. It's installed on top of fan duct and be with fan guard to prevent danger of fan hit. |
| WATER BASIN | Made of fiber glass reinforced plastic. It will receive cooled water leaving from bottom of the filler. Cooled water will flow into auxilrary suction tank before it will be sucked and recirculated back for cooling machines and equipments. Basin should have enough volume so that water level will never lower than outlet at starting up and water will never over flow at stopping. |
| FILLER | Made of PVC plastic film and corrugated. Water will spreaded over filler. Corrugation will create thin film of water. The film enhances heat transfer between water and air stream. |
| DRIFT ELIMINATOR | Made of fiber glass reinforced plastic (FRP). It will prevent carrying over of small water droplet with air stream leaving the tower. It will minimize water drift loss. |
